Which of the following non-metals are used in fertilisers?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Both Phosphorus and Nitrogen
Plants need nitrogen, phosphorus and potassium in large amounts, and fertilisers supply them. Nitrogen (in urea and ammonium salts) and phosphorus (in superphosphate) are non-metals; potassium is a metal.